//
// Created by 束庆乐 on 2024/12/30.
//
#include "iostream"
using namespace std;
//函数占位参数，占位参数也可以有默认参数
void func(int a , int){
    cout << "this is func" << endl;

}
int main049(){
    //占位参数必须填补
    func(10,10);


    return 0;
}